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| author | Star Zeng <star.zeng@intel.com> | 2015-05-19 01:33:25 +0000 |
|---|---|---|
| committer | lzeng14 <lzeng14@Edk2> | 2015-05-19 01:33:25 +0000 |
| commit | c7b897519e710487e82e08e37516a7cf73647c69 (patch) | |
| tree | 0c0271e6f810b2439de20d21b3357c0b4597ec55 | |
| parent | d3460bcbdce5fddbbc64ae6fa9d80b2c55cdee14 (diff) | |
| download | edk2-c7b897519e710487e82e08e37516a7cf73647c69.tar.gz edk2-c7b897519e710487e82e08e37516a7cf73647c69.tar.bz2 edk2-c7b897519e710487e82e08e37516a7cf73647c69.zip | |
SecurityPkg Variable: Prevent BS variable update in legacy OS runtime.
Contributed-under: TianoCore Contribution Agreement 1.0
Signed-off-by: Star Zeng <star.zeng@intel.com>
Reviewed-by: Jiewen Yao <jiewen.yao@intel.com>
Reviewed-by: Liming Gao <liming.gao@intel.com>
git-svn-id: https://svn.code.sf.net/p/edk2/code/trunk/edk2@17468 6f19259b-4bc3-4df7-8a09-765794883524
| -rw-r--r-- | SecurityPkg/VariableAuthenticated/RuntimeDxe/VariableSmmRuntimeDxe.c | 12 |
1 files changed, 12 insertions, 0 deletions
diff --git a/SecurityPkg/VariableAuthenticated/RuntimeDxe/VariableSmmRuntimeDxe.c b/SecurityPkg/VariableAuthenticated/RuntimeDxe/VariableSmmRuntimeDxe.c index be5c935a88..e87e12fc99 100644 --- a/SecurityPkg/VariableAuthenticated/RuntimeDxe/VariableSmmRuntimeDxe.c +++ b/SecurityPkg/VariableAuthenticated/RuntimeDxe/VariableSmmRuntimeDxe.c @@ -1019,6 +1019,7 @@ VariableSmmRuntimeInitialize ( VOID *SmmVariableWriteRegistration;
EFI_EVENT OnReadyToBootEvent;
EFI_EVENT ExitBootServiceEvent;
+ EFI_EVENT LegacyBootEvent;
EfiInitializeLock (&mVariableServicesLock, TPL_NOTIFY);
@@ -1087,6 +1088,17 @@ VariableSmmRuntimeInitialize ( );
//
+ // Register the event to inform SMM variable that it is at runtime for legacy boot.
+ // Reuse OnExitBootServices() here.
+ //
+ EfiCreateEventLegacyBootEx(
+ TPL_NOTIFY,
+ OnExitBootServices,
+ NULL,
+ &LegacyBootEvent
+ );
+
+ //
// Register the event to convert the pointer for runtime.
//
gBS->CreateEventEx (
|